How do you reply to many

Hi there,
we posted a job ad and got about 900 responses, theres no way that we can respond individually but they have been processed and tagged with either 'yes' 'no' or 'maybe'. I can filter my inbox to just show 'no's via the tags so i can get a list of all of the people to reply with a 'thanks but sorry' response. In my old mail client i could just highlight all the messages and just press 'reply' and it would churn for a sec and then give me all of the addresses in the reply field of the new mail.